(1)  The Director, by notice in writing served on a person who holds an approval, may vary the conditions of the approval.

(2)  The variation of the conditions of an approval takes effect –

(a) if an application for review of the decision to vary the conditions is not made under section 160C – 28 days after the notice of the variation is served under subsection (1) ; or

(b) if an application for review of the decision to vary the conditions is made under section 160C and the Magistrates Court (Administrative Appeals Division) makes a decision affirming the decision under review – on the day the decision was affirmed.